git.sur5r.net Git - openldap/blob - servers/slapd/backend.c

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2004 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 #include "ldap_rq.h"
  41
  42 #ifdef LDAP_SLAPI
  43 #include "slapi/slapi.h"
  44
  45 static void init_group_pblock( Operation *op, Entry *target,
  46         Entry *e, struct berval *op_ndn, AttributeDescription *group_at );
  47 static int call_group_preop_plugins( Operation *op );
  48 static void call_group_postop_plugins( Operation *op );
  49 #endif /* LDAP_SLAPI */
  50
  51 /*
  52  * If a module is configured as dynamic, its header should not
  53  * get included into slapd. While this is a general rule and does
  54  * not have much of an effect in UNIX, this rule should be adhered
  55  * to for Windows, where dynamic object code should not be implicitly
  56  * imported into slapd without appropriate __declspec(dllimport) directives.
  57  */
  58
  59 #if SLAPD_BDB == SLAPD_MOD_STATIC
  60 #include "back-bdb/external.h"
  61 #endif
  62 #if SLAPD_DNSSRV == SLAPD_MOD_STATIC
  63 #include "back-dnssrv/external.h"
  64 #endif
  65 #if SLAPD_HDB == SLAPD_MOD_STATIC
  66 #include "back-hdb/external.h"
  67 #endif
  68 #if SLAPD_LDAP == SLAPD_MOD_STATIC
  69 #include "back-ldap/external.h"
  70 #endif
  71 #if SLAPD_LDBM == SLAPD_MOD_STATIC
  72 #include "back-ldbm/external.h"
  73 #endif
  74 #if SLAPD_META == SLAPD_MOD_STATIC
  75 #include "back-meta/external.h"
  76 #endif
  77 #if SLAPD_MONITOR == SLAPD_MOD_STATIC
  78 #include "back-monitor/external.h"
  79 #endif
  80 #if SLAPD_NULL == SLAPD_MOD_STATIC
  81 #include "back-null/external.h"
  82 #endif
  83 #if SLAPD_PASSWD == SLAPD_MOD_STATIC
  84 #include "back-passwd/external.h"
  85 #endif
  86 #if SLAPD_PERL == SLAPD_MOD_STATIC
  87 #include "back-perl/external.h"
  88 #endif
  89 #if SLAPD_RELAY == SLAPD_MOD_STATIC
  90 #include "back-relay/external.h"
  91 #endif
  92 #if SLAPD_SHELL == SLAPD_MOD_STATIC
  93 #include "back-shell/external.h"
  94 #endif
  95 #if SLAPD_TCL == SLAPD_MOD_STATIC
  96 #include "back-tcl/external.h"
  97 #endif
  98 #if SLAPD_SQL == SLAPD_MOD_STATIC
  99 #include "back-sql/external.h"
 100 #endif
 101 #if SLAPD_PRIVATE == SLAPD_MOD_STATIC
 102 #include "private/external.h"
 103 #endif
 104
 105 static BackendInfo binfo[] = {
 106 #if SLAPD_BDB == SLAPD_MOD_STATIC
 107         {"bdb", bdb_initialize},
 108 #endif
 109 #if SLAPD_DNSSRV == SLAPD_MOD_STATIC
 110         {"dnssrv",      dnssrv_back_initialize},
 111 #endif
 112 #if SLAPD_HDB == SLAPD_MOD_STATIC
 113         {"hdb", hdb_initialize},
 114 #endif
 115 #if SLAPD_LDAP == SLAPD_MOD_STATIC
 116         {"ldap",        ldap_back_initialize},
 117 #endif
 118 #if SLAPD_LDBM == SLAPD_MOD_STATIC
 119         {"ldbm",        ldbm_back_initialize},
 120 #endif
 121 #if SLAPD_META == SLAPD_MOD_STATIC
 122         {"meta",        meta_back_initialize},
 123 #endif
 124 #if SLAPD_MONITOR == SLAPD_MOD_STATIC
 125         {"monitor",     monitor_back_initialize},
 126 #endif
 127 #if SLAPD_NULL == SLAPD_MOD_STATIC
 128         {"null",        null_back_initialize},
 129 #endif
 130 #if SLAPD_PASSWD == SLAPD_MOD_STATIC
 131         {"passwd",      passwd_back_initialize},
 132 #endif
 133 #if SLAPD_PERL == SLAPD_MOD_STATIC
 134         {"perl",        perl_back_initialize},
 135 #endif
 136 #if SLAPD_RELAY == SLAPD_MOD_STATIC
 137         {"relay",       relay_back_initialize},
 138 #endif
 139 #if SLAPD_SHELL == SLAPD_MOD_STATIC
 140         {"shell",       shell_back_initialize},
 141 #endif
 142 #if SLAPD_TCL == SLAPD_MOD_STATIC
 143         {"tcl",         tcl_back_initialize},
 144 #endif
 145 #if SLAPD_SQL == SLAPD_MOD_STATIC
 146         {"sql",         sql_back_initialize},
 147 #endif
 148         /* for any private backend */
 149 #if SLAPD_PRIVATE == SLAPD_MOD_STATIC
 150         {"private",     private_back_initialize},
 151 #endif
 152         {NULL}
 153 };
 154
 155 int                     nBackendInfo = 0;
 156 BackendInfo     *backendInfo = NULL;
 157
 158 int                     nBackendDB = 0;
 159 BackendDB       *backendDB = NULL;
 160
 161 ldap_pvt_thread_pool_t  syncrepl_pool;
 162 int                     syncrepl_pool_max = SLAP_MAX_SYNCREPL_THREADS;
 163
 164 int backend_init(void)
 165 {
 166         int rc = -1;
 167
 168         ldap_pvt_thread_pool_init( &syncrepl_pool, syncrepl_pool_max, 0 );
 169
 170         if((nBackendInfo != 0) || (backendInfo != NULL)) {
 171                 /* already initialized */
 172 #ifdef NEW_LOGGING
 173                 LDAP_LOG( BACKEND, ERR,
 174                         "backend_init:  backend already initialized\n", 0, 0, 0 );
 175 #else
 176                 Debug( LDAP_DEBUG_ANY,
 177                         "backend_init: already initialized.\n", 0, 0, 0 );
 178 #endif
 179                 return -1;
 180         }
 181
 182         for( ;
 183                 binfo[nBackendInfo].bi_type != NULL;
 184                 nBackendInfo++ )
 185         {
 186                 assert( binfo[nBackendInfo].bi_init );
 187
 188                 rc = binfo[nBackendInfo].bi_init( &binfo[nBackendInfo] );
 189
 190                 if(rc != 0) {
 191 #ifdef NEW_LOGGING
 192                         LDAP_LOG( BACKEND, INFO,
 193                                 "backend_init:  initialized for type \"%s\"\n",
 194                                 binfo[nBackendInfo].bi_type, 0, 0 );
 195 #else
 196                         Debug( LDAP_DEBUG_ANY,
 197                                 "backend_init: initialized for type \"%s\"\n",
 198                                 binfo[nBackendInfo].bi_type, 0, 0 );
 199 #endif
 200                         /* destroy those we've already inited */
 201                         for( nBackendInfo--;
 202                                 nBackendInfo >= 0 ;
 203                                 nBackendInfo-- )
 204                         {
 205                                 if ( binfo[nBackendInfo].bi_destroy ) {
 206                                         binfo[nBackendInfo].bi_destroy(
 207                                                 &binfo[nBackendInfo] );
 208                                 }
 209                         }
 210                         return rc;
 211                 }
 212         }
 213
 214         if ( nBackendInfo > 0) {
 215                 backendInfo = binfo;
 216                 return 0;
 217         }
 218
 219 #ifdef SLAPD_MODULES
 220         return 0;
 221 #else
 222
 223 #ifdef NEW_LOGGING
 224         LDAP_LOG( BACKEND, ERR, "backend_init: failed\n", 0, 0, 0 );
 225 #else
 226         Debug( LDAP_DEBUG_ANY,
 227                 "backend_init: failed\n",
 228                 0, 0, 0 );
 229 #endif
 230
 231         return rc;
 232 #endif /* SLAPD_MODULES */
 233 }
 234
 235 int backend_add(BackendInfo *aBackendInfo)
 236 {
 237         int rc = 0;
 238
 239         if ( aBackendInfo->bi_init == NULL ) {
 240 #ifdef NEW_LOGGING
 241                 LDAP_LOG( BACKEND, ERR, "backend_add: "
 242                         "backend type \"%s\" does not have the (mandatory)init function\n",
 243                         aBackendInfo->bi_type, 0, 0 );
 244 #else
 245                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 246                         "backend type \"%s\" does not have the (mandatory)init function\n",
 247                         aBackendInfo->bi_type, 0, 0 );
 248 #endif
 249                 return -1;
 250         }
 251
 252    if ((rc = aBackendInfo->bi_init(aBackendInfo)) != 0) {
 253 #ifdef NEW_LOGGING
 254                 LDAP_LOG( BACKEND, ERR,
 255                         "backend_add:  initialization for type \"%s\" failed\n",
 256                         aBackendInfo->bi_type, 0, 0 );
 257 #else
 258                 Debug( LDAP_DEBUG_ANY,
 259                         "backend_add:  initialization for type \"%s\" failed\n",
 260                         aBackendInfo->bi_type, 0, 0 );
 261 #endif
 262                 return rc;
 263    }
 264
 265         /* now add the backend type to the Backend Info List */
 266         {
 267                 BackendInfo *newBackendInfo = 0;
 268
 269                 /* if backendInfo == binfo no deallocation of old backendInfo */
 270                 if (backendInfo == binfo) {
 271                         newBackendInfo = ch_calloc(nBackendInfo + 1, sizeof(BackendInfo));
 272                         AC_MEMCPY(newBackendInfo, backendInfo,
 273                                 sizeof(BackendInfo) * nBackendInfo);
 274                 } else {
 275                         newBackendInfo = ch_realloc(backendInfo,
 276                                 sizeof(BackendInfo) * (nBackendInfo + 1));
 277                 }
 278
 279                 AC_MEMCPY(&newBackendInfo[nBackendInfo], aBackendInfo,
 280                         sizeof(BackendInfo));
 281                 backendInfo = newBackendInfo;
 282                 nBackendInfo++;
 283                 return 0;
 284         }
 285 }
 286
 287 /* startup a specific backend database */
 288 int backend_startup_one(Backend *be)
 289 {
 290         int rc = 0;
 291
 292         assert(be);
 293
 294         be->be_pending_csn_list = (struct be_pcl *)
 295                 ch_calloc( 1, sizeof( struct be_pcl ));
 296         build_new_dn( &be->be_context_csn, be->be_nsuffix,
 297                 (struct berval *)&slap_ldapsync_cn_bv, NULL );
 298
 299         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 300
 301 #ifdef NEW_LOGGING
 302         LDAP_LOG( BACKEND, DETAIL1, "backend_startup:  starting \"%s\"\n",
 303                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 304                 0, 0 );
 305 #else
 306         Debug( LDAP_DEBUG_TRACE,
 307                 "backend_startup: starting \"%s\"\n",
 308                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 309                 0, 0 );
 310 #endif
 311         if ( be->bd_info->bi_db_open ) {
 312                 rc = be->bd_info->bi_db_open( be );
 313                 if ( rc != 0 ) {
 314 #ifdef NEW_LOGGING
 315                         LDAP_LOG( BACKEND, CRIT,
 316                                 "backend_startup: bi_db_open failed! (%d)\n", rc, 0, 0 );
 317 #else
 318                         Debug( LDAP_DEBUG_ANY,
 319                                 "backend_startup: bi_db_open failed! (%d)\n",
 320                                 rc, 0, 0 );
 321 #endif
 322                 }
 323         }
 324         return rc;
 325 }
 326
 327 int backend_startup(Backend *be)
 328 {
 329         int i;
 330         int rc = 0;
 331
 332         if( ! ( nBackendDB > 0 ) ) {
 333                 /* no databases */
 334 #ifdef NEW_LOGGING
 335                 LDAP_LOG( BACKEND, INFO,
 336                         "backend_startup: %d databases to startup. \n", nBackendDB, 0, 0 );
 337 #else
 338                 Debug( LDAP_DEBUG_ANY,
 339                         "backend_startup: %d databases to startup.\n",
 340                         nBackendDB, 0, 0 );
 341 #endif
 342                 return 1;
 343         }
 344
 345         if(be != NULL) {
 346                 if ( be->bd_info->bi_open ) {
 347                         rc = be->bd_info->bi_open( be->bd_info );
 348                         if ( rc != 0 ) {
 349 #ifdef NEW_LOGGING
 350                                 LDAP_LOG( BACKEND, CRIT,
 351                                         "backend_startup: bi_open failed!\n", 0, 0, 0 );
 352 #else
 353                                 Debug( LDAP_DEBUG_ANY,
 354                                         "backend_startup: bi_open failed!\n",
 355                                         0, 0, 0 );
 356 #endif
 357
 358                                 return rc;
 359                         }
 360                 }
 361
 362                 return backend_startup_one( be );
 363         }
 364
 365         /* open frontend, if required */
 366         if ( frontendDB->bd_info->bi_db_open ) {
 367                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 368                 if ( rc != 0 ) {
 369 #ifdef NEW_LOGGING
 370                         LDAP_LOG( BACKEND, CRIT,
 371                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 372                                 rc, 0, 0 );
 373 #else
 374                         Debug( LDAP_DEBUG_ANY,
 375                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 376                                 rc, 0, 0 );
 377 #endif
 378                         return rc;
 379                 }
 380         }
 381
 382         /* open each backend type */
 383         for( i = 0; i < nBackendInfo; i++ ) {
 384                 if( backendInfo[i].bi_nDB == 0) {
 385                         /* no database of this type, don't open */
 386                         continue;
 387                 }
 388
 389                 if( backendInfo[i].bi_open ) {
 390                         rc = backendInfo[i].bi_open(
 391                                 &backendInfo[i] );
 392                         if ( rc != 0 ) {
 393 #ifdef NEW_LOGGING
 394                                 LDAP_LOG( BACKEND, CRIT,
 395                                         "backend_startup: bi_open %d failed!\n", i, 0, 0 );
 396 #else
 397                                 Debug( LDAP_DEBUG_ANY,
 398                                         "backend_startup: bi_open %d failed!\n",
 399                                         i, 0, 0 );
 400 #endif
 401                                 return rc;
 402                         }
 403                 }
 404         }
 405
 406         ldap_pvt_thread_mutex_init( &syncrepl_rq.rq_mutex );
 407         LDAP_STAILQ_INIT( &syncrepl_rq.task_list );
 408         LDAP_STAILQ_INIT( &syncrepl_rq.run_list );
 409
 410         /* open each backend database */
 411         for( i = 0; i < nBackendDB; i++ ) {
 412                 if ( backendDB[i].be_suffix == NULL ) {
 413 #ifdef NEW_LOGGING
 414                         LDAP_LOG( BACKEND, CRIT,
 415                                 "backend_startup: warning, database %d (%s) "
 416                                 "has no suffix\n",
 417                                 i, backendDB[i].bd_info->bi_type, 0 );
 418 #else
 419                         Debug( LDAP_DEBUG_ANY,
 420                                 "backend_startup: warning, database %d (%s) "
 421                                 "has no suffix\n",
 422                                 i, backendDB[i].bd_info->bi_type, 0 );
 423 #endif
 424                 }
 425                 /* append global access controls */
 426                 acl_append( &backendDB[i].be_acl, frontendDB->be_acl );
 427
 428                 rc = backend_startup_one( &backendDB[i] );
 429
 430                 if ( rc ) return rc;
 431
 432
 433                 if ( !LDAP_STAILQ_EMPTY( &backendDB[i].be_syncinfo )) {
 434                         syncinfo_t *si;
 435
 436                         if ( !( backendDB[i].be_search && backendDB[i].be_add &&
 437                                 backendDB[i].be_modify && backendDB[i].be_delete )) {
 438 #ifdef NEW_LOGGING
 439                                 LDAP_LOG( BACKEND, CRIT,
 440                                         "backend_startup: database(%d) does not support "
 441                                         "operations required for syncrepl", i, 0, 0 );
 442 #else
 443                                 Debug( LDAP_DEBUG_ANY,
 444                                         "backend_startup: database(%d) does not support "
 445                                         "operations required for syncrepl", i, 0, 0 );
 446 #endif
 447                                 continue;
 448                         }
 449
 450                         LDAP_STAILQ_FOREACH( si, &backendDB[i].be_syncinfo, si_next ) {
 451                                 si->si_be = &backendDB[i];
 452                                 init_syncrepl( si );
 453                                 ldap_pvt_thread_mutex_lock( &syncrepl_rq.rq_mutex );
 454                                 ldap_pvt_runqueue_insert( &syncrepl_rq,
 455                                                 si->si_interval, do_syncrepl, (void *) si );
 456                                 ldap_pvt_thread_mutex_unlock( &syncrepl_rq.rq_mutex );
 457                         }
 458                 }
 459         }
 460
 461         return rc;
 462 }
 463
 464 int backend_num( Backend *be )
 465 {
 466         int i;
 467
 468         if( be == NULL ) return -1;
 469
 470         for( i = 0; i < nBackendDB; i++ ) {
 471                 if( be == &backendDB[i] ) return i;
 472         }
 473         return -1;
 474 }
 475
 476 int backend_shutdown( Backend *be )
 477 {
 478         int i;
 479         int rc = 0;
 480
 481         if( be != NULL ) {
 482                 /* shutdown a specific backend database */
 483
 484                 if ( be->bd_info->bi_nDB == 0 ) {
 485                         /* no database of this type, we never opened it */
 486                         return 0;
 487                 }
 488
 489                 if ( be->bd_info->bi_db_close ) {
 490                         be->bd_info->bi_db_close( be );
 491                 }
 492
 493                 if( be->bd_info->bi_close ) {
 494                         be->bd_info->bi_close( be->bd_info );
 495                 }
 496
 497                 return 0;
 498         }
 499
 500         /* close each backend database */
 501         for( i = 0; i < nBackendDB; i++ ) {
 502                 if ( backendDB[i].bd_info->bi_db_close ) {
 503                         backendDB[i].bd_info->bi_db_close(
 504                                 &backendDB[i] );
 505                 }
 506
 507                 if(rc != 0) {
 508 #ifdef NEW_LOGGING
 509                         LDAP_LOG( BACKEND, NOTICE,
 510                                 "backend_shutdown: bi_db_close %s failed!\n",
 511                                 backendDB[i].be_type, 0, 0 );
 512 #else
 513                         Debug( LDAP_DEBUG_ANY,
 514                                 "backend_close: bi_db_close %s failed!\n",
 515                                 backendDB[i].be_type, 0, 0 );
 516 #endif
 517                 }
 518         }
 519
 520         /* close each backend type */
 521         for( i = 0; i < nBackendInfo; i++ ) {
 522                 if( backendInfo[i].bi_nDB == 0 ) {
 523                         /* no database of this type */
 524                         continue;
 525                 }
 526
 527                 if( backendInfo[i].bi_close ) {
 528                         backendInfo[i].bi_close(
 529                                 &backendInfo[i] );
 530                 }
 531         }
 532
 533         /* close frontend, if required */
 534         if ( frontendDB->bd_info->bi_db_close ) {
 535                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 536                 if ( rc != 0 ) {
 537 #ifdef NEW_LOGGING
 538                         LDAP_LOG( BACKEND, CRIT,
 539                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 540                                 rc, 0, 0 );
 541 #else
 542                         Debug( LDAP_DEBUG_ANY,
 543                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 544                                 rc, 0, 0 );
 545 #endif
 546                 }
 547         }
 548
 549         return 0;
 550 }
 551
 552 int backend_destroy(void)
 553 {
 554         int i;
 555         BackendDB *bd;
 556
 557         ldap_pvt_thread_pool_destroy( &syncrepl_pool, 1 );
 558
 559         /* destroy each backend database */
 560         for( i = 0, bd = backendDB; i < nBackendDB; i++, bd++ ) {
 561                 if ( bd->bd_info->bi_db_destroy ) {
 562                         bd->bd_info->bi_db_destroy( bd );
 563                 }
 564                 ber_bvarray_free( bd->be_suffix );
 565                 ber_bvarray_free( bd->be_nsuffix );
 566                 if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
 567                 if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
 568                 if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
 569                 if ( bd->be_context_csn.bv_val ) free( bd->be_context_csn.bv_val );
 570                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 571         }
 572         free( backendDB );
 573
 574         /* destroy each backend type */
 575         for( i = 0; i < nBackendInfo; i++ ) {
 576                 if( backendInfo[i].bi_destroy ) {
 577                         backendInfo[i].bi_destroy(
 578                                 &backendInfo[i] );
 579                 }
 580         }
 581
 582 #ifdef SLAPD_MODULES
 583         if (backendInfo != binfo) {
 584            free(backendInfo);
 585         }
 586 #endif /* SLAPD_MODULES */
 587
 588         nBackendInfo = 0;
 589         backendInfo = NULL;
 590
 591         /* destroy frontend database */
 592         bd = frontendDB;
 593         if ( bd->bd_info->bi_db_destroy ) {
 594                 bd->bd_info->bi_db_destroy( bd );
 595         }
 596         ber_bvarray_free( bd->be_suffix );
 597         ber_bvarray_free( bd->be_nsuffix );
 598         if ( bd->be_rootdn.bv_val ) free( bd->be_rootdn.bv_val );
 599         if ( bd->be_rootndn.bv_val ) free( bd->be_rootndn.bv_val );
 600         if ( bd->be_rootpw.bv_val ) free( bd->be_rootpw.bv_val );
 601         acl_destroy( bd->be_acl, frontendDB->be_acl );
 602
 603         return 0;
 604 }
 605
 606 BackendInfo* backend_info(const char *type)
 607 {
 608         int i;
 609
 610         /* search for the backend type */
 611         for( i = 0; i < nBackendInfo; i++ ) {
 612                 if( strcasecmp(backendInfo[i].bi_type, type) == 0 ) {
 613                         return &backendInfo[i];
 614                 }
 615         }
 616
 617         return NULL;
 618 }
 619
 620
 621 BackendDB *
 622 backend_db_init(
 623     const char  *type )
 624 {
 625         Backend *be;
 626         BackendInfo *bi = backend_info(type);
 627         int     rc = 0;
 628
 629         if( bi == NULL ) {
 630                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 631                 return NULL;
 632         }
 633
 634         be = backendDB;
 635
 636         backendDB = (BackendDB *) ch_realloc(
 637                         (char *) backendDB,
 638                     (nBackendDB + 1) * sizeof(Backend) );
 639
 640         memset( &backendDB[nbackends], '\0', sizeof(Backend) );
 641
 642         /* did realloc move our table? if so, fix up dependent pointers */
 643         if ( be != backendDB ) {
 644                 int i;
 645                 for ( i=0, be=backendDB; i<nbackends; i++, be++ ) {
 646                         be->be_pcl_mutexp = &be->be_pcl_mutex;
 647                 }
 648         }
 649
 650         be = &backends[nbackends++];
 651
 652         be->bd_info = bi;
 653         be->be_def_limit = frontendDB->be_def_limit;
 654         be->be_dfltaccess = frontendDB->be_dfltaccess;
 655
 656         be->be_restrictops = frontendDB->be_restrictops;
 657         be->be_requires = frontendDB->be_requires;
 658         be->be_ssf_set = frontendDB->be_ssf_set;
 659
 660         be->be_context_csn.bv_len = 0;
 661         be->be_context_csn.bv_val = NULL;
 662         be->be_pcl_mutexp = &be->be_pcl_mutex;
 663         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 664
 665         LDAP_STAILQ_INIT( &be->be_syncinfo );
 666
 667         /* assign a default depth limit for alias deref */
 668         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 669
 670         if(bi->bi_db_init) {
 671                 rc = bi->bi_db_init( be );
 672         }
 673
 674         if(rc != 0) {
 675                 fprintf( stderr, "database init failed (%s)\n", type );
 676                 nbackends--;
 677                 return NULL;
 678         }
 679
 680         bi->bi_nDB++;
 681         return( be );
 682 }
 683
 684 void
 685 be_db_close( void )
 686 {
 687         int     i;
 688
 689         for ( i = 0; i < nbackends; i++ ) {
 690                 if ( backends[i].bd_info->bi_db_close ) {
 691                         (*backends[i].bd_info->bi_db_close)( &backends[i] );
 692                 }
 693         }
 694
 695         if ( frontendDB->bd_info->bi_db_close ) {
 696                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 697         }
 698 }
 699
 700 Backend *
 701 select_backend(
 702         struct berval * dn,
 703         int manageDSAit,
 704         int noSubs )
 705 {
 706         int     i, j;
 707         ber_len_t len, dnlen = dn->bv_len;
 708         Backend *be = NULL;
 709
 710         for ( i = 0; i < nbackends; i++ ) {
 711                 for ( j = 0; backends[i].be_nsuffix != NULL &&
 712                     backends[i].be_nsuffix[j].bv_val != NULL; j++ )
 713                 {
 714                         if ( ( SLAP_GLUE_SUBORDINATE( &backends[i] ) )
 715                                 && noSubs )
 716                         {
 717                                 continue;
 718                         }
 719
 720                         len = backends[i].be_nsuffix[j].bv_len;
 721
 722                         if ( len > dnlen ) {
 723                                 /* suffix is longer than DN */
 724                                 continue;
 725                         }
 726
 727                         /*
 728                          * input DN is normalized, so the separator check
 729                          * need not look at escaping
 730                          */
 731                         if ( len && len < dnlen &&
 732                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 733                         {
 734                                 continue;
 735                         }
 736
 737                         if ( strcmp( backends[i].be_nsuffix[j].bv_val,
 738                                 &dn->bv_val[dnlen-len] ) == 0 )
 739                         {
 740                                 if( be == NULL ) {
 741                                         be = &backends[i];
 742
 743                                         if( manageDSAit && len == dnlen &&
 744                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 745                                                 continue;
 746                                         }
 747                                 } else {
 748                                         be = &backends[i];
 749                                 }
 750                                 return be;
 751                         }
 752                 }
 753         }
 754
 755         return be;
 756 }
 757
 758 int
 759 be_issuffix(
 760     Backend *be,
 761     struct berval *bvsuffix )
 762 {
 763         int     i;
 764
 765         for ( i = 0;
 766                 be->be_nsuffix != NULL && be->be_nsuffix[i].bv_val != NULL;
 767                 i++ )
 768         {
 769                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 770                         return( 1 );
 771                 }
 772         }
 773
 774         return( 0 );
 775 }
 776
 777 int
 778 be_isroot_dn( Backend *be, struct berval *ndn )
 779 {
 780         if ( !ndn->bv_len ) {
 781                 return( 0 );
 782         }
 783
 784         if ( !be->be_rootndn.bv_len ) {
 785                 return( 0 );
 786         }
 787
 788         return dn_match( &be->be_rootndn, ndn );
 789 }
 790
 791 int
 792 be_sync_update( Operation *op )
 793 {
 794         return ( SLAP_SYNC_SHADOW( op->o_bd ) && syncrepl_isupdate( op ) );
 795 }
 796
 797 int
 798 be_slurp_update( Operation *op )
 799 {
 800         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 801                 be_isupdate_dn( op->o_bd, &op->o_ndn ));
 802 }
 803
 804 int
 805 be_shadow_update( Operation *op )
 806 {
 807         return ( SLAP_SHADOW( op->o_bd ) &&
 808                 ( syncrepl_isupdate( op ) || be_isupdate_dn( op->o_bd, &op->o_ndn )));
 809 }
 810
 811 int
 812 be_isupdate_dn( Backend *be, struct berval *ndn )
 813 {
 814         if ( !ndn->bv_len ) return( 0 );
 815
 816         if ( !be->be_update_ndn.bv_len ) return( 0 );
 817
 818         return dn_match( &be->be_update_ndn, ndn );
 819 }
 820
 821 struct berval *
 822 be_root_dn( Backend *be )
 823 {
 824         return &be->be_rootdn;
 825 }
 826
 827 int
 828 be_isroot( Operation *op )
 829 {
 830         return be_isroot_dn( op->o_bd, &op->o_ndn );
 831 }
 832
 833 int
 834 be_isroot_pw( Operation *op )
 835 {
 836         int result;
 837
 838         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 839                 return 0;
 840         }
 841
 842         if( op->o_bd->be_rootpw.bv_len == 0 ) {
 843                 return 0;
 844         }
 845
 846 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 847         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 848 #ifdef SLAPD_SPASSWD
 849         lutil_passwd_sasl_conn = op->o_conn->c_sasl_authctx;
 850 #endif
 851 #endif
 852
 853         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 854
 855 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 856 #ifdef SLAPD_SPASSWD
 857         lutil_passwd_sasl_conn = NULL;
 858 #endif
 859         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 860 #endif
 861
 862         return result == 0;
 863 }
 864
 865 int
 866 be_entry_release_rw(
 867         Operation *op,
 868         Entry *e,
 869         int rw )
 870 {
 871         if ( op->o_bd->be_release ) {
 872                 /* free and release entry from backend */
 873                 return op->o_bd->be_release( op, e, rw );
 874         } else {
 875                 /* free entry */
 876                 entry_free( e );
 877                 return 0;
 878         }
 879 }
 880
 881 int
 882 backend_unbind( Operation *op, SlapReply *rs )
 883 {
 884         int             i;
 885
 886         for ( i = 0; i < nbackends; i++ ) {
 887 #if defined( LDAP_SLAPI )
 888                 if ( op->o_pb ) {
 889                         int rc;
 890                         if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
 891                         slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)&backends[i] );
 892                         rc = slapi_int_call_plugins( &backends[i],
 893                                 SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
 894                         if ( rc < 0 ) {
 895                                 /*
 896                                  * A preoperation plugin failure will abort the
 897                                  * entire operation.
 898                                  */
 899 #ifdef NEW_LOGGING
 900                                 LDAP_LOG( OPERATION, INFO,
 901                                         "do_bind: Unbind preoperation plugin failed\n",
 902                                         0, 0, 0);
 903 #else
 904                                 Debug(LDAP_DEBUG_TRACE,
 905                                         "do_bind: Unbind preoperation plugin failed\n",
 906                                         0, 0, 0);
 907 #endif
 908                                 return 0;
 909                         }
 910                 }
 911 #endif /* defined( LDAP_SLAPI ) */
 912
 913                 if ( backends[i].be_unbind ) {
 914                         op->o_bd = &backends[i];
 915                         (*backends[i].be_unbind)( op, rs );
 916                 }
 917
 918 #if defined( LDAP_SLAPI )
 919                 if ( op->o_pb != NULL && slapi_int_call_plugins( &backends[i],
 920                         SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
 921                 {
 922 #ifdef NEW_LOGGING
 923                         LDAP_LOG( OPERATION, INFO,
 924                                 "do_unbind: Unbind postoperation plugins failed\n",
 925                                 0, 0, 0);
 926 #else
 927                         Debug(LDAP_DEBUG_TRACE,
 928                                 "do_unbind: Unbind postoperation plugins failed\n",
 929                                 0, 0, 0);
 930 #endif
 931                 }
 932 #endif /* defined( LDAP_SLAPI ) */
 933         }
 934
 935         return 0;
 936 }
 937
 938 int
 939 backend_connection_init(
 940         Connection   *conn )
 941 {
 942         int     i;
 943
 944         for ( i = 0; i < nbackends; i++ ) {
 945                 if ( backends[i].be_connection_init ) {
 946                         (*backends[i].be_connection_init)( &backends[i], conn);
 947                 }
 948         }
 949
 950         return 0;
 951 }
 952
 953 int
 954 backend_connection_destroy(
 955         Connection   *conn )
 956 {
 957         int     i;
 958
 959         for ( i = 0; i < nbackends; i++ ) {
 960                 if ( backends[i].be_connection_destroy ) {
 961                         (*backends[i].be_connection_destroy)( &backends[i], conn);
 962                 }
 963         }
 964
 965         return 0;
 966 }
 967
 968 static int
 969 backend_check_controls(
 970         Operation *op,
 971         SlapReply *rs )
 972 {
 973         LDAPControl **ctrls = op->o_ctrls;
 974         rs->sr_err = LDAP_SUCCESS;
 975
 976         if( ctrls ) {
 977                 for( ; *ctrls != NULL ; ctrls++ ) {
 978                         if( (*ctrls)->ldctl_iscritical && !ldap_charray_inlist(
 979                                 op->o_bd->be_controls, (*ctrls)->ldctl_oid ) )
 980                         {
 981                                 rs->sr_text = "control unavailable in context";
 982                                 rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
 983                                 break;
 984                         }
 985                 }
 986         }
 987
 988         return rs->sr_err;
 989 }
 990
 991 int
 992 backend_check_restrictions(
 993         Operation *op,
 994         SlapReply *rs,
 995         struct berval *opdata )
 996 {
 997         slap_mask_t restrictops;
 998         slap_mask_t requires;
 999         slap_mask_t opflag;
1000         slap_mask_t exopflag = 0;
1001         slap_ssf_set_t *ssf;
1002         int updateop = 0;
1003         int starttls = 0;
1004         int session = 0;
1005
1006         if( op->o_bd ) {
1007                 if ( backend_check_controls( op, rs ) != LDAP_SUCCESS ) {
1008                         return rs->sr_err;
1009                 }
1010
1011                 restrictops = op->o_bd->be_restrictops;
1012                 requires = op->o_bd->be_requires;
1013                 ssf = &op->o_bd->be_ssf_set;
1014
1015         } else {
1016                 restrictops = frontendDB->be_restrictops;
1017                 requires = frontendDB->be_requires;
1018                 ssf = &frontendDB->be_ssf_set;
1019         }
1020
1021         switch( op->o_tag ) {
1022         case LDAP_REQ_ADD:
1023                 opflag = SLAP_RESTRICT_OP_ADD;
1024                 updateop++;
1025                 break;
1026         case LDAP_REQ_BIND:
1027                 opflag = SLAP_RESTRICT_OP_BIND;
1028                 session++;
1029                 break;
1030         case LDAP_REQ_COMPARE:
1031                 opflag = SLAP_RESTRICT_OP_COMPARE;
1032                 break;
1033         case LDAP_REQ_DELETE:
1034                 updateop++;
1035                 opflag = SLAP_RESTRICT_OP_DELETE;
1036                 break;
1037         case LDAP_REQ_EXTENDED:
1038                 opflag = SLAP_RESTRICT_OP_EXTENDED;
1039
1040                 if( !opdata ) {
1041                         /* treat unspecified as a modify */
1042                         opflag = SLAP_RESTRICT_OP_MODIFY;
1043                         updateop++;
1044                         break;
1045                 }
1046
1047                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
1048                         session++;
1049                         starttls++;
1050                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
1051                         break;
1052                 }
1053
1054                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
1055                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
1056                         break;
1057                 }
1058
1059                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
1060                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
1061                         break;
1062                 }
1063
1064                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
1065                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
1066                         updateop++;
1067                         break;
1068                 }
1069
1070                 /* treat everything else as a modify */
1071                 opflag = SLAP_RESTRICT_OP_MODIFY;
1072                 updateop++;
1073                 break;
1074
1075         case LDAP_REQ_MODIFY:
1076                 updateop++;
1077                 opflag = SLAP_RESTRICT_OP_MODIFY;
1078                 break;
1079         case LDAP_REQ_RENAME:
1080                 updateop++;
1081                 opflag = SLAP_RESTRICT_OP_RENAME;
1082                 break;
1083         case LDAP_REQ_SEARCH:
1084                 opflag = SLAP_RESTRICT_OP_SEARCH;
1085                 break;
1086         case LDAP_REQ_UNBIND:
1087                 session++;
1088                 opflag = 0;
1089                 break;
1090         default:
1091                 rs->sr_text = "restrict operations internal error";
1092                 rs->sr_err = LDAP_OTHER;
1093                 return rs->sr_err;
1094         }
1095
1096         if ( !starttls ) {
1097                 /* these checks don't apply to StartTLS */
1098
1099                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
1100                 if( op->o_transport_ssf < ssf->sss_transport ) {
1101                         rs->sr_text = op->o_transport_ssf
1102                                 ? "stronger transport confidentiality required"
1103                                 : "transport confidentiality required";
1104                         return rs->sr_err;
1105                 }
1106
1107                 if( op->o_tls_ssf < ssf->sss_tls ) {
1108                         rs->sr_text = op->o_tls_ssf
1109                                 ? "stronger TLS confidentiality required"
1110                                 : "TLS confidentiality required";
1111                         return rs->sr_err;
1112                 }
1113
1114
1115                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1116                         /* simple bind specific check */
1117                         if( op->o_ssf < ssf->sss_simple_bind ) {
1118                                 rs->sr_text = op->o_ssf
1119                                         ? "stronger confidentiality required"
1120                                         : "confidentiality required";
1121                                 return rs->sr_err;
1122                         }
1123                 }
1124
1125                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1126                         /* these checks don't apply to SASL bind */
1127
1128                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1129                                 rs->sr_text = op->o_sasl_ssf
1130                                         ? "stronger SASL confidentiality required"
1131                                         : "SASL confidentiality required";
1132                                 return rs->sr_err;
1133                         }
1134
1135                         if( op->o_ssf < ssf->sss_ssf ) {
1136                                 rs->sr_text = op->o_ssf
1137                                         ? "stronger confidentiality required"
1138                                         : "confidentiality required";
1139                                 return rs->sr_err;
1140                         }
1141                 }
1142
1143                 if( updateop ) {
1144                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1145                                 rs->sr_text = op->o_transport_ssf
1146                                         ? "stronger transport confidentiality required for update"
1147                                         : "transport confidentiality required for update";
1148                                 return rs->sr_err;
1149                         }
1150
1151                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1152                                 rs->sr_text = op->o_tls_ssf
1153                                         ? "stronger TLS confidentiality required for update"
1154                                         : "TLS confidentiality required for update";
1155                                 return rs->sr_err;
1156                         }
1157
1158                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1159                                 rs->sr_text = op->o_sasl_ssf
1160                                         ? "stronger SASL confidentiality required for update"
1161                                         : "SASL confidentiality required for update";
1162                                 return rs->sr_err;
1163                         }
1164
1165                         if( op->o_ssf < ssf->sss_update_ssf ) {
1166                                 rs->sr_text = op->o_ssf
1167                                         ? "stronger confidentiality required for update"
1168                                         : "confidentiality required for update";
1169                                 return rs->sr_err;
1170                         }
1171
1172                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1173                                 op->o_ndn.bv_len == 0 )
1174                         {
1175                                 rs->sr_text = "modifications require authentication";
1176                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1177                                 return rs->sr_err;
1178                         }
1179
1180 #ifdef SLAP_X_LISTENER_MOD
1181                         if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( op->o_ndn.bv_len > 0 ? S_IWUSR : S_IWOTH ) ) ) {
1182                                 /* no "w" mode means readonly */
1183                                 rs->sr_text = "modifications not allowed on this listener";
1184                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1185                                 return rs->sr_err;
1186                         }
1187 #endif /* SLAP_X_LISTENER_MOD */
1188                 }
1189         }
1190
1191         if ( !session ) {
1192                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1193
1194                 if( requires & SLAP_REQUIRE_STRONG ) {
1195                         /* should check mechanism */
1196                         if( ( op->o_transport_ssf < ssf->sss_transport
1197                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1198                                 || op->o_dn.bv_len == 0 )
1199                         {
1200                                 rs->sr_text = "strong(er) authentication required";
1201                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1202                                 return rs->sr_err;
1203                         }
1204                 }
1205
1206                 if( requires & SLAP_REQUIRE_SASL ) {
1207                         if( op->o_authtype != LDAP_AUTH_SASL || op->o_dn.bv_len == 0 ) {
1208                                 rs->sr_text = "SASL authentication required";
1209                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1210                                 return rs->sr_err;
1211                         }
1212                 }
1213
1214                 if( requires & SLAP_REQUIRE_AUTHC ) {
1215                         if( op->o_dn.bv_len == 0 ) {
1216                                 rs->sr_text = "authentication required";
1217                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1218                                 return rs->sr_err;
1219                         }
1220                 }
1221
1222                 if( requires & SLAP_REQUIRE_BIND ) {
1223                         int version;
1224                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1225                         version = op->o_conn->c_protocol;
1226                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1227
1228                         if( !version ) {
1229                                 /* no bind has occurred */
1230                                 rs->sr_text = "BIND required";
1231                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1232                                 return rs->sr_err;
1233                         }
1234                 }
1235
1236                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1237                         if( op->o_protocol < LDAP_VERSION3 ) {
1238                                 /* no bind has occurred */
1239                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1240                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1241                                 return rs->sr_err;
1242                         }
1243                 }
1244
1245 #ifdef SLAP_X_LISTENER_MOD
1246                 if ( !starttls && op->o_dn.bv_len == 0 ) {
1247                         if ( op->o_conn->c_listener &&
1248                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1249                 {
1250                                 /* no "x" mode means bind required */
1251                                 rs->sr_text = "bind required on this listener";
1252                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1253                                 return rs->sr_err;
1254                         }
1255                 }
1256
1257                 if ( !starttls && !updateop ) {
1258                         if ( op->o_conn->c_listener &&
1259                                 !( op->o_conn->c_listener->sl_perms &
1260                                         ( op->o_dn.bv_len > 0 ? S_IRUSR : S_IROTH )))
1261                         {
1262                                 /* no "r" mode means no read */
1263                                 rs->sr_text = "read not allowed on this listener";
1264                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1265                                 return rs->sr_err;
1266                         }
1267                 }
1268 #endif /* SLAP_X_LISTENER_MOD */
1269
1270         }
1271
1272         if( ( restrictops & opflag )
1273                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1274                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1275                         rs->sr_text = "read operations restricted";
1276                 } else if ( restrictops & exopflag ) {
1277                         rs->sr_text = "extended operation restricted";
1278                 } else {
1279                         rs->sr_text = "operation restricted";
1280                 }
1281                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1282                 return rs->sr_err;
1283         }
1284
1285         rs->sr_err = LDAP_SUCCESS;
1286         return rs->sr_err;
1287 }
1288
1289 int backend_check_referrals( Operation *op, SlapReply *rs )
1290 {
1291         rs->sr_err = LDAP_SUCCESS;
1292
1293         if( op->o_bd->be_chk_referrals ) {
1294                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1295
1296                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1297                         send_ldap_result( op, rs );
1298                 }
1299         }
1300
1301         return rs->sr_err;
1302 }
1303
1304 int
1305 be_entry_get_rw(
1306         Operation *op,
1307         struct berval *ndn,
1308         ObjectClass *oc,
1309         AttributeDescription *at,
1310         int rw,
1311         Entry **e )
1312 {
1313         int rc;
1314
1315         *e = NULL;
1316
1317         if (op->o_bd == NULL) {
1318                 rc = LDAP_NO_SUCH_OBJECT;
1319         } else if ( op->o_bd->be_fetch ) {
1320                 rc = ( op->o_bd->be_fetch )( op, ndn,
1321                         oc, at, rw, e );
1322         } else {
1323                 rc = LDAP_UNWILLING_TO_PERFORM;
1324         }
1325         return rc;
1326 }
1327
1328 int
1329 backend_group(
1330         Operation *op,
1331         Entry   *target,
1332         struct berval *gr_ndn,
1333         struct berval *op_ndn,
1334         ObjectClass *group_oc,
1335         AttributeDescription *group_at )
1336 {
1337         Entry *e;
1338         Attribute *a;
1339         int rc;
1340         GroupAssertion *g;
1341         Backend *be = op->o_bd;
1342
1343         if ( op->o_abandon ) return SLAPD_ABANDON;
1344
1345         op->o_bd = select_backend( gr_ndn, 0, 0 );
1346
1347         for (g = op->o_groups; g; g=g->ga_next) {
1348                 if (g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1349                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len)
1350                         continue;
1351                 if (strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0)
1352                         break;
1353         }
1354
1355         if (g) {
1356                 rc = g->ga_res;
1357                 goto done;
1358         }
1359
1360         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1361                 e = target;
1362                 rc = 0;
1363         } else {
1364                 rc = be_entry_get_rw(op, gr_ndn, group_oc, group_at, 0, &e );
1365         }
1366         if ( e ) {
1367 #ifdef LDAP_SLAPI
1368                 if ( op->o_pb != NULL ) {
1369                         init_group_pblock( op, target, e, op_ndn, group_at );
1370
1371                         rc = call_group_preop_plugins( op );
1372                         if ( rc == LDAP_SUCCESS ) {
1373                                 goto done;
1374                         }
1375                 }
1376 #endif /* LDAP_SLAPI */
1377
1378                 a = attr_find( e->e_attrs, group_at );
1379                 if ( a ) {
1380                         /* If the attribute is a subtype of labeledURI, treat this as
1381                          * a dynamic group ala groupOfURLs
1382                          */
1383                         if (is_at_subtype( group_at->ad_type,
1384                                 slap_schema.si_ad_labeledURI->ad_type ) )
1385                         {
1386                                 int i;
1387                                 LDAPURLDesc *ludp;
1388                                 struct berval bv, nbase;
1389                                 Filter *filter;
1390                                 Entry *user;
1391                                 Backend *b2 = op->o_bd;
1392
1393                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1394                                         user = target;
1395                                 } else {
1396                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1397                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1398                                 }
1399
1400                                 if ( rc == 0 ) {
1401                                         rc = 1;
1402                                         for (i=0; a->a_vals[i].bv_val; i++) {
1403                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1404                                                         LDAP_SUCCESS )
1405                                                 {
1406                                                         continue;
1407                                                 }
1408                                                 nbase.bv_val = NULL;
1409                                                 /* host part must be empty */
1410                                                 /* attrs and extensions parts must be empty */
1411                                                 if (( ludp->lud_host && *ludp->lud_host ) ||
1412                                                         ludp->lud_attrs || ludp->lud_exts )
1413                                                 {
1414                                                         goto loopit;
1415                                                 }
1416                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1417                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1418                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1419                                                 {
1420                                                         goto loopit;
1421                                                 }
1422                                                 switch(ludp->lud_scope) {
1423                                                 case LDAP_SCOPE_BASE:
1424                                                         if ( !dn_match( &nbase, op_ndn )) goto loopit;
1425                                                         break;
1426                                                 case LDAP_SCOPE_ONELEVEL:
1427                                                         dnParent(op_ndn, &bv );
1428                                                         if ( !dn_match( &nbase, &bv )) goto loopit;
1429                                                         break;
1430                                                 case LDAP_SCOPE_SUBTREE:
1431                                                         if ( !dnIsSuffix( op_ndn, &nbase )) goto loopit;
1432                                                         break;
1433 #ifdef LDAP_SCOPE_SUBORDINATE
1434                                                 case LDAP_SCOPE_SUBORDINATE:
1435                                                         if ( dn_match( &nbase, op_ndn ) &&
1436                                                                 !dnIsSuffix(op_ndn, &nbase ))
1437                                                         {
1438                                                                 goto loopit;
1439                                                         }
1440 #endif
1441                                                 }
1442                                                 filter = str2filter_x( op, ludp->lud_filter );
1443                                                 if ( filter ) {
1444                                                         if ( test_filter( NULL, user, filter ) ==
1445                                                                 LDAP_COMPARE_TRUE )
1446                                                         {
1447                                                                 rc = 0;
1448                                                         }
1449                                                         filter_free_x( op, filter );
1450                                                 }
1451 loopit:
1452                                                 ldap_free_urldesc( ludp );
1453                                                 if ( nbase.bv_val ) {
1454                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1455                                                 }
1456                                                 if ( rc == 0 ) break;
1457                                         }
1458                                         if ( user != target ) {
1459                                                 be_entry_release_r( op, user );
1460                                         }
1461                                 }
1462                                 op->o_bd = b2;
1463                         } else {
1464                                 rc = value_find_ex( group_at,
1465                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1466                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1467                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1468                         }
1469                 } else {
1470                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1471                 }
1472                 if (e != target ) {
1473                         be_entry_release_r( op, e );
1474                 }
1475         } else {
1476                 rc = LDAP_NO_SUCH_OBJECT;
1477         }
1478
1479 #ifdef LDAP_SLAPI
1480         if ( op->o_pb ) call_group_postop_plugins( op );
1481 #endif /* LDAP_SLAPI */
1482
1483         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1484                 g = op->o_tmpalloc(sizeof(GroupAssertion) + gr_ndn->bv_len,
1485                         op->o_tmpmemctx);
1486                 g->ga_be = op->o_bd;
1487                 g->ga_oc = group_oc;
1488                 g->ga_at = group_at;
1489                 g->ga_res = rc;
1490                 g->ga_len = gr_ndn->bv_len;
1491                 strcpy(g->ga_ndn, gr_ndn->bv_val);
1492                 g->ga_next = op->o_groups;
1493                 op->o_groups = g;
1494         }
1495 done:
1496         op->o_bd = be;
1497         return rc;
1498 }
1499
1500 #ifdef LDAP_SLAPI
1501 static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1502 {
1503         BerVarray v;
1504         int rc;
1505         BerVarray *vals = (BerVarray *)c->cac_private;
1506         Operation *op = NULL;
1507         int i, j;
1508
1509         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1510         if ( op == NULL ) {
1511                 return 1;
1512         }
1513
1514         if ( op->o_conn && access_allowed( op,
1515                 e, a->a_desc, NULL, ACL_AUTH,
1516                 &c->cac_acl_state ) == 0 ) {
1517                 return 1;
1518         }
1519
1520         for ( i=0; a->a_vals[i].bv_val; i++ ) ;
1521
1522         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1523                 op->o_tmpmemctx );
1524         for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
1525                 if ( op->o_conn && access_allowed( op,
1526                         e, a->a_desc,
1527                         &a->a_nvals[i],
1528                         ACL_AUTH, &c->cac_acl_state ) == 0 ) {
1529                         continue;
1530                 }
1531                 ber_dupbv_x( &v[j],
1532                         &a->a_nvals[i], op->o_tmpmemctx );
1533                 if (v[j].bv_val ) j++;
1534         }
1535
1536         if (j == 0) {
1537                 op->o_tmpfree( v, op->o_tmpmemctx );
1538                 *vals = NULL;
1539                 rc = 1;
1540         } else {
1541                 v[j].bv_val = NULL;
1542                 v[j].bv_len = 0;
1543                 *vals = v;
1544                 rc = 0;
1545         }
1546
1547         return rc;
1548 }
1549 #endif /* LDAP_SLAPI */
1550
1551 int
1552 backend_attribute(
1553         Operation *op,
1554         Entry   *target,
1555         struct berval   *edn,
1556         AttributeDescription *entry_at,
1557         BerVarray *vals,
1558         slap_access_t access )
1559 {
1560         Entry *e;
1561         Attribute *a;
1562         int i, j, rc = LDAP_SUCCESS;
1563         AccessControlState acl_state = ACL_STATE_INIT;
1564         Backend *be = op->o_bd;
1565
1566         op->o_bd = select_backend( edn, 0, 0 );
1567
1568         if ( target && dn_match( &target->e_nname, edn ) ) {
1569                 e = target;
1570         } else {
1571                 rc = be_entry_get_rw(op, edn, NULL, entry_at, 0, &e );
1572         }
1573
1574         if ( e ) {
1575                 a = attr_find( e->e_attrs, entry_at );
1576                 if ( a ) {
1577                         BerVarray v;
1578
1579                         if ( op->o_conn && access > ACL_NONE && access_allowed( op,
1580                                 e, entry_at, NULL, access,
1581                                 &acl_state ) == 0 ) {
1582                                 rc = LDAP_INSUFFICIENT_ACCESS;
1583                                 goto freeit;
1584                         }
1585
1586                         for ( i=0; a->a_vals[i].bv_val; i++ ) ;
1587
1588                         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1589                                 op->o_tmpmemctx );
1590                         for ( i=0,j=0; a->a_vals[i].bv_val; i++ ) {
1591                                 if ( op->o_conn && access > ACL_NONE && access_allowed( op,
1592                                         e, entry_at,
1593                                         &a->a_nvals[i],
1594                                         access, &acl_state ) == 0 ) {
1595                                         continue;
1596                                 }
1597                                 ber_dupbv_x( &v[j],
1598                                         &a->a_nvals[i], op->o_tmpmemctx );
1599                                 if (v[j].bv_val ) j++;
1600                         }
1601                         if (j == 0) {
1602                                 op->o_tmpfree( v, op->o_tmpmemctx );
1603                                 *vals = NULL;
1604                                 rc = LDAP_INSUFFICIENT_ACCESS;
1605                         } else {
1606                                 v[j].bv_val = NULL;
1607                                 v[j].bv_len = 0;
1608                                 *vals = v;
1609                                 rc = LDAP_SUCCESS;
1610                         }
1611                 }
1612 #ifdef LDAP_SLAPI
1613                 else if ( op->o_pb ) {
1614                         /* try any computed attributes */
1615                         computed_attr_context ctx;
1616                         AttributeName aname;
1617
1618                         slapi_int_pblock_set_operation( op->o_pb, op );
1619
1620                         ctx.cac_pb = op->o_pb;
1621                         ctx.cac_attrs = NULL;
1622                         ctx.cac_userattrs = 0;
1623                         ctx.cac_opattrs = 0;
1624                         ctx.cac_acl_state = acl_state;
1625                         ctx.cac_private = (void *)vals;
1626
1627                         if ( compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr ) == 1)
1628                                 rc = LDAP_INSUFFICIENT_ACCESS;
1629                         else
1630                                 rc = LDAP_SUCCESS;
1631                 }
1632 #endif /* LDAP_SLAPI */
1633 freeit:         if (e != target ) {
1634                         be_entry_release_r( op, e );
1635                 }
1636         }
1637
1638         op->o_bd = be;
1639         return rc;
1640 }
1641
1642 int backend_operational(
1643         Operation *op,
1644         SlapReply *rs )
1645 {
1646         Attribute       **ap;
1647         int             rc = 0;
1648
1649         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1650                 /* just count them */ ;
1651
1652         /*
1653          * If operational attributes (allegedly) are required,
1654          * and the backend supports specific operational attributes,
1655          * add them to the attribute list
1656          */
1657         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( op->ors_attrs &&
1658                 ad_inlist( slap_schema.si_ad_subschemaSubentry, op->ors_attrs )) ) {
1659                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1660
1661                 ap = &(*ap)->a_next;
1662         }
1663
1664         if ( ( SLAP_OPATTRS( rs->sr_attr_flags ) || op->ors_attrs ) && op->o_bd &&
1665                 op->o_bd->be_operational != NULL )
1666         {
1667                 Attribute       *a;
1668
1669                 a = rs->sr_operational_attrs;
1670                 rs->sr_operational_attrs = NULL;
1671                 rc = op->o_bd->be_operational( op, rs );
1672                 *ap = rs->sr_operational_attrs;
1673                 if ( a != NULL ) {
1674                         rs->sr_operational_attrs = a;
1675                 }
1676
1677                 for ( ; *ap; ap = &(*ap)->a_next )
1678                         /* just count them */ ;
1679         }
1680
1681         return rc;
1682 }
1683
1684 #ifdef LDAP_SLAPI
1685 static void init_group_pblock( Operation *op, Entry *target,
1686         Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
1687 {
1688         slapi_int_pblock_set_operation( op->o_pb, op );
1689         slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_ENTRY, (void *)e );
1690         slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
1691         slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
1692         slapi_pblock_set( op->o_pb, SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
1693 }
1694
1695 static int call_group_preop_plugins( Operation *op )
1696 {
1697         int rc;
1698
1699         rc = slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
1700         if ( rc < 0 ) {
1701                 if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
1702                         (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
1703                 {
1704                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1705                 }
1706         } else {
1707                 rc = LDAP_SUCCESS;
1708         }
1709
1710         return rc;
1711 }
1712
1713 static void call_group_postop_plugins( Operation *op )
1714 {
1715         (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
1716 }
1717 #endif /* LDAP_SLAPI */
1718